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Discussion Starter #1
after my 3.5 downpipe install I lost 2 psi I bumped it back up to 12. today I replaced all the bends from downpipe to cut off with mandrel bent piping I lost another pound is this normal? Should I just bump it up back to 12?


thanks fellas
 

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Discussion Starter #2
also I had to tighten the bov screw to get the boost back up to 12
 

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Boost is measure of restricton and back pressure. Just becuase boost went down doesnt necessarily mean flow/power went down. Less back pressure from the larger exhuast is jsut effecting the boost reading and wg operation. So make sure your a/f is still good when you up the boost back up.
 

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Discussion Starter #4
Bumped it up again a/f at wot is 11.5 to 11.7
 

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Boost is measure of restricton and back pressure. Just becuase boost went down doesnt necessarily mean flow/power went down. Less back pressure from the larger exhuast is jsut effecting the boost reading and wg operation. So make sure your a/f is still good when you up the boost back up.
This guy said the exact same thing I was going to say. Which is correct.
 
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